Register an outgoing webhook URL for one or more events

curl -X POST 'https://api.expiryedge.com/v1/createWebhookSubscription' \
  -H "Authorization: Bearer $EXPIRYEDGE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "url": "https://hooks.northwind-dental.com/expiryedge",
  "events": [
    "expiry.completed",
    "collection_submission.received"
  ],
  "description": "CRM sync"
}'

{
  "subscription": {
    "id": "wh_3kQ9xLm2",
    "url": "https://hooks.northwind-dental.com/expiryedge",
    "events": [
      "expiry.completed",
      "collection_submission.received"
    ],
    "description": "CRM sync",
    "active": true,
    "disabled_reason": null,
    "disabled_at": null,
    "consecutive_failures": 0,
    "last_delivery_at": null,
    "last_delivery_status": null,
    "secret_hint": "whsec_...9f2c",
    "created_by": "u_71bXq",
    "created_at": "2026-09-27T14:05:00.000Z",
    "updated_at": "2026-09-27T14:05:00.000Z",
    "secret": "whsec_4b1e0c2d7a9e5f3b8c1d6e4f2a0b9c8d7e6f5a4b3c2d1e0f9a8b7c6d5e4f9f2c"
  }
}